Backbone-induced effects in the charge transport efficiency of synthetic DNA molecules
Backbone-induced effects in the charge transport efficiency of synthetic DNA molecules
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DOI：
10.1088/0957-4484/17/12/031
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发表时间：
2006-06-28
期刊：
影响因子：
3.5
通讯作者：
Roche, Stephan
中科院分区：
文献类型：
--
作者：
Macia, Enrique;Roche, Stephan
我们报告的理论研究指出的基本作用的骨干能量的聚G-聚C和聚A-聚T链的电荷转移效率。双链DNA（ds-DNA）分子的建模在一个单通道的有效哈密顿量。通过引入两步重整化方案，得到了能谱和透射系数的解析解，并对电流-电压特性进行了数值研究。的主要的I-V特性（电压阈值，电流幅度）的显着调制的报告和其物理起源追溯到骨干诱导的电子效应。这些结果为旨在控制基于合成DNA的纳米器件中的电荷转移效率的实验工作开辟了新的前景。
We report on a theoretical study pointing out the fundamental role of the backbone energetics in the charge transfer efficiency of polyG - polyC and polyA - polyT chains. The double-strand DNA (ds-DNA) molecules are modelled in terms of a single channel effective Hamiltonian. By introducing a two-step renormalization scheme analytical results for the energy spectrum and transmission coefficient are derived, and current - voltage characteristics are numerically investigated. Significant modulations of the main I - V features ( voltage threshold, current amplitude) are reported and their physical origin is traced back to backbone-induced electronic effects. These results open new perspectives for experimental work aimed at controlling the charge transfer efficiency in nanodevices based on synthetic DNA.